Cytokinin regulates root meristem activity via modulation of
the polar auxin transport.

J 2009

Cytokinin regulates root meristem activity via modulation of the polar auxin transport.

RŮŽIČKA, Kamil, Mária ŠIMÁŠKOVÁ, Jerome DUCLERCQ, Jan PETRÁSEK, Eva ZAŽÍMALOVÁ et. al.

Basic information

Original name

Cytokinin regulates root meristem activity via modulation of the polar auxin transport.

Name in Czech

Cytokinin regulates root meristem activity via modulation of the polar auxin transport.

Authors

RŮŽIČKA, Kamil (203 Czech Republic), Mária ŠIMÁŠKOVÁ (703 Slovakia), Jerome DUCLERCQ (250 France), Jan PETRÁSEK (203 Czech Republic), Eva ZAŽÍMALOVÁ (203 Czech Republic), Sibu SIMON (356 India), Jiří FRIML (203 Czech Republic, guarantor), Marc C. E VAN MONTAGU (56 Belgium) and Eva BENKOVÁ (703 Slovakia)

Edition

Proceedings of the National Academy of Sciences of the United States of America, 2009, 0027-8424

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

Genetics and molecular biology

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 9.432

RIV identification code

RIV/00216224:14310/09:00035272

Organization unit

Faculty of Science

UT WoS

000264278800043

Keywords in English

auxin;auxin transport;cytokinin;hormonal crosstalk;root meristem

Abstract

ORIG CZ

V originále

Plant development is governed by signaling molecules called phytohormones. Typically, in certain developmental processes more than 1 hormone is implicated and, thus, coordination of their overlapping activities is crucial for correct plant development. However, molecular mechanisms underlying the hormonal crosstalk are only poorly understood. Multiple hormones including cytokinin and auxin have been implicated in the regulation of root development. Here we dissect the roles of cytokinin in modulating growth of the primary root. We show that cytokinin effect on root elongation occurs through ethylene signaling whereas cytokinin effect on the root meristem size involves ethylene-independent modulation of transport-dependent asymmetric auxin distribution. Exogenous or endogenous modification of cytokinin levels and cytokinin signaling lead to specific changes in transcription of several auxin efflux carrier genes from the PIN family having a direct impact on auxin efflux from cultured cells and on auxin distribution in the root apex. We propose a novel model for cytokinin action in regulating root growth: Cytokinin influences cell-to-cell auxin transport by modification of expression of several auxin transport components and thus modulates auxin distribution important for regulation of activity and size of the root meristem.

In Czech

Vyvoj rostlin je regulovany rostlinymi hormony, jejichz vzajemna interakce je dulezita. Vyvoj korene ovlivnuje nekolik hormonu vcetne cytokininu a auxinu. V tomto clanku objasnujeme, ze cytokinin ovlivnuje velikost korenoveho meristemu regulaci transkripce PIN auxinovych transporteru. Navrhujeme novy model jak cytokinin ovlivnuje rust korene: Cytokinin reguluje expresi PIN transporteru, takto modifikuje auxinnove gradienty a reguluje aktivitu a velikost korenoveho meristemu.

Links

LC06034, research and development project

Name: Regulace morfogeneze rostlinných buněk a orgánů

Investor: Ministry of Education, Youth and Sports of the CR, Regulation of morphogenesis of plant cells and organs

Citovat

RŮŽIČKA, Kamil, Mária ŠIMÁŠKOVÁ, Jerome DUCLERCQ, Jan PETRÁSEK, Eva ZAŽÍMALOVÁ, Sibu SIMON, Jiří FRIML, Marc C. E VAN MONTAGU and Eva BENKOVÁ. Cytokinin regulates root meristem activity via modulation of the polar auxin transport. Proceedings of the National Academy of Sciences of the United States of America. 2009, vol. 106, No 11, p. 4284–4289. ISSN 0027-8424.

@article{825695,
   author = {Růžička, Kamil and Šimášková, Mária and Duclercq, Jerome and Petrásek, Jan and Zažímalová, Eva and Simon, Sibu and Friml, Jiří and Van Montagu, Marc C. E and Benková, Eva},
   article_number = {11},
   keywords = {auxin;auxin transport;cytokinin;hormonal crosstalk;root meristem},
   language = {eng},
   issn = {0027-8424},
   journal = {Proceedings of the National Academy of Sciences of the United States of America},
   title = {Cytokinin regulates root meristem activity via modulation of the polar auxin transport.},
   volume = {106},
   year = {2009}
}

TY  - JOUR
ID  - 825695
AU  - Růžička, Kamil - Šimášková, Mária - Duclercq, Jerome - Petrásek, Jan - Zažímalová, Eva - Simon, Sibu - Friml, Jiří - Van Montagu, Marc C. E - Benková, Eva
PY  - 2009
TI  - Cytokinin regulates root meristem activity via modulation of the polar auxin transport.
JF  - Proceedings of the National Academy of Sciences of the United States of America
VL  - 106
IS  - 11
SP  - 4284–4289
EP  - 4284–4289
SN  - 00278424
KW  - auxin;auxin transport;cytokinin;hormonal crosstalk;root meristem
N2  - Plant development is governed by signaling molecules called phytohormones. Typically, in certain developmental processes more than 1 hormone is implicated and, thus, coordination of their overlapping activities is crucial for correct plant development. However, molecular mechanisms underlying the hormonal crosstalk are only poorly understood. Multiple hormones including cytokinin and auxin have been implicated in the regulation of root development. Here we dissect the roles of cytokinin in modulating growth of the primary root. We show that cytokinin effect on root elongation occurs through ethylene signaling whereas cytokinin effect on the root meristem size involves ethylene-independent modulation of transport-dependent asymmetric auxin distribution. Exogenous or endogenous modification of cytokinin levels and cytokinin signaling lead to specific changes in transcription of several auxin efflux carrier genes from the PIN family having a direct impact on auxin efflux from cultured cells and on auxin distribution in the root apex. We propose a novel model for cytokinin action in regulating root growth: Cytokinin influences cell-to-cell auxin transport by modification of expression of several auxin transport components and thus modulates auxin distribution important for regulation of activity and size of the root meristem.
ER  -

RŮŽIČKA, Kamil, Mária ŠIMÁŠKOVÁ, Jerome DUCLERCQ, Jan PETRÁSEK, Eva ZAŽÍMALOVÁ, Sibu SIMON, Jiří FRIML, Marc C. E VAN MONTAGU and Eva BENKOVÁ. Cytokinin regulates root meristem activity via modulation of the polar auxin transport. \textit{Proceedings of the National Academy of Sciences of the United States of America}. 2009, vol.~106, No~11, p.~4284–4289. ISSN~0027-8424.

Detailed Information on Publication Record